|By Martin Etmajer||
|October 27, 2014 11:00 PM EDT||
How to Approach Application Failures in Production
In my recent article, "Software Quality Metrics for your Continuous Delivery Pipeline - Part III - Logging," I wrote about the good parts and the not-so-good parts of logging and concluded that logging usually fails to deliver what it is so often mistakenly used for: as a mechanism for analyzing application failures in production. In response to the heated debates on reddit.com/r/devops and reddit.com/r/programing, I want to demonstrate the wealth of out-of-the-box insights you could obtain from a single urgent, albeit unspecific log message if you only are equipped with the magic ingredient; full transaction context:
Examples of insights you could obtain from full transaction context on a single log message
Bear with me until I get to explain what this actually means and how it helps you get almost immediate answers to the most urgent questions when your users are struck by an application failure:
- "How many users are affected and who are they?"
- "Which tiers are affected by which errors and what is the root cause?"
Operator: I'm here because you broke something. (courtesy of ThinkGeek.com)
When All You Have Is a Lousy Log Message
Does this story sound familiar to you? It's a Friday afternoon and you just received the release artifacts from the development team belatedly, which need to be released by Monday morning. After spending the night and another day in operations to get this release out into production timely, you notice the Monday after that everything you have achieved in the end was some lousy log message:
08:55:26 SEVERE com.company.product.login.LoginLogic - LoginException occurred when processing Login transaction
While this scenario hopefully does not reflect a common case for you, it still shows an important aspect in the life of development and operations: working as an operator involves monitoring the production environment and providing assistance in troubleshooting application failures mainly with the help of log messages - things that developers have baked into their code. While certainly not all log messages need to be as poor as this one, getting down to the bottom of a production failure is often a tedious endeavor (see this comment on reddit by RecklessKelly who sometimes needs weeks to get his "Eureka moment") - if at all possible.
Why There Is No Such Thing as a 100% Error-Free Code
Production failures can become a major pain for your business with long-term effects: they will not only make your visitors buy elsewhere, but depending on the level of frustrations, your customers may choose to stay at your competition instead of giving you another chance.
As we all know, we just cannot get rid of application failures in production entirely. Agile methodologies, such as Extreme Programming or Scrum, aim to build quality into our processes; however, there is still no such thing as a 100% error-free application. "We need to write more tests!" you may argue and I would agree: disciplines such as TDD and ATDD should be an integral part of your software development process since they, if applied correctly, help you produce better code and fewer bugs. Still, it is simply impossible to test each and every corner of your application for all possible combinations of input parameters and application state. Essentially, we can run only a limited subset of all possible test scenarios. The common goal of developers and test automation engineers, hence, must be to implement a testing strategy, which allows them to deliver code of sufficient quality. Consequently, there is always a chance that something can go wrong, and, as a serious business, you will want to be prepared for the unpredictable and, additionally, have as much control over it as possible:
Why you cannot get rid of application failures in production: remaining failure probability
Without further ado, let's examine some precious out-of-the-box insights you could obtain if you are equipped with full transaction context and are able to capture all transactions.
Why this is important? Because it enables you to see the contributions of input parameters, processes, infrastructure and users at all times whenever a failure occurred, solve problems faster, and additionally use the presented information such as unexpected input parameters to further improve your testing strategy.
Initial Situation: Aggregated Log Messages
Instead of crawling a bunch of possibly distributed log files to determine the count of particular log messages, we may, first of all, want to have this done automatically for us just as they happen. This gives a good overview on the respective message frequencies and facilitates prioritization:
Aggregated log events: severity, logger name, message and count
What we see here (analysis view based on our PurePath technology) is that there have been 104 occurrences of the same log message in the application. We could also observe other captured event data, such as the severity level and the name of the logger instance (usually the name of the class that created the logger).
Question #1: How many users are affected and who are they?
Failed Business Transactions: "Logins" and "Logins by Username"
Having the full transactional context and not just the log message allows us to figure out which critical Business Transactions of our application are impacted. From the dashboard above we can observe that "Logins" and "Logins by Username" have failed: we see that 61 users attempted the 104 logins and who these users were by their username.
For questions 2 and 3, and for further insight, click here for the full article.
The best-practices for building IoT applications with Go Code that attendees can use to build their own IoT applications. In his session at @ThingsExpo, Indraneel Mitra, Senior Solutions Architect & Technology Evangelist at Cognizant, provided valuable information and resources for both novice and experienced developers on how to get started with IoT and Golang in a day. He also provided information on how to use Intel Arduino Kit, Go Robotics API and AWS IoT stack to build an application tha...
Jul. 25, 2016 10:00 AM EDT Reads: 937
[guide] Cloud Analytics for Dummies | @CloudExpo @Informatica #API #Cloud #Analytics #BusinessIntelligence
Cloud analytics is dramatically altering business intelligence. Some businesses will capitalize on these promising new technologies and gain key insights that’ll help them gain competitive advantage. And others won’t. Whether you’re a business leader, an IT manager, or an analyst, we want to help you and the people you need to influence with a free copy of “Cloud Analytics for Dummies,” the essential guide to this explosive new space for business intelligence.
Jul. 25, 2016 09:45 AM EDT Reads: 666
SYS-CON Events announced today that LeaseWeb USA, a cloud Infrastructure-as-a-Service (IaaS) provider, will exhibit at the 19th International Cloud Expo, which will take place on November 1–3, 2016, at the Santa Clara Convention Center in Santa Clara, CA. LeaseWeb is one of the world's largest hosting brands. The company helps customers define, develop and deploy IT infrastructure tailored to their exact business needs, by combining various kinds cloud solutions.
Jul. 25, 2016 09:45 AM EDT Reads: 1,110
Aspose.Total for .NET is the most complete package of all file format APIs for .NET as offered by Aspose. It empowers developers to create, edit, render, print and convert between a wide range of popular document formats within any .NET, C#, ASP.NET and VB.NET applications. Aspose compiles all .NET APIs on a daily basis to ensure that it contains the most up to date versions of each of Aspose .NET APIs. If a new .NET API or a new version of existing APIs is released during the subscription peri...
Jul. 25, 2016 09:30 AM EDT Reads: 646
Whether your IoT service is connecting cars, homes, appliances, wearable, cameras or other devices, one question hangs in the balance – how do you actually make money from this service? The ability to turn your IoT service into profit requires the ability to create a monetization strategy that is flexible, scalable and working for you in real-time. It must be a transparent, smoothly implemented strategy that all stakeholders – from customers to the board – will be able to understand and comprehe...
Jul. 25, 2016 09:30 AM EDT Reads: 2,089
Adding public cloud resources to an existing application can be a daunting process. The tools that you currently use to manage the software and hardware outside the cloud aren’t always the best tools to efficiently grow into the cloud. All of the major configuration management tools have cloud orchestration plugins that can be leveraged, but there are also cloud-native tools that can dramatically improve the efficiency of managing your application lifecycle. In his session at 18th Cloud Expo, ...
Jul. 25, 2016 09:30 AM EDT Reads: 890
The cloud market growth today is largely in public clouds. While there is a lot of spend in IT departments in virtualization, these aren’t yet translating into a true “cloud” experience within the enterprise. What is stopping the growth of the “private cloud” market? In his general session at 18th Cloud Expo, Nara Rajagopalan, CEO of Accelerite, explored the challenges in deploying, managing, and getting adoption for a private cloud within an enterprise. What are the key differences between wh...
Jul. 25, 2016 09:15 AM EDT Reads: 1,978
Ixia (Nasdaq: XXIA) has announced that NoviFlow Inc.has deployed IxNetwork® to validate the company’s designs and accelerate the delivery of its proven, reliable products. Based in Montréal, NoviFlow Inc. supports network carriers, hyperscale data center operators, and enterprises seeking greater network control and flexibility, network scalability, and the capacity to handle extremely large numbers of flows, while maintaining maximum network performance. To meet these requirements, NoviFlow in...
Jul. 25, 2016 09:12 AM EDT Reads: 168
SaaS companies can greatly expand revenue potential by pushing beyond their own borders. The challenge is how to do this without degrading service quality. In his session at 18th Cloud Expo, Adam Rogers, Managing Director at Anexia, discussed how IaaS providers with a global presence and both virtual and dedicated infrastructure can help companies expand their service footprint with low “go-to-market” costs.
Jul. 25, 2016 09:00 AM EDT Reads: 2,322
SYS-CON Events announced today that 910Telecom will exhibit at the 19th International Cloud Expo, which will take place on November 1–3, 2016, at the Santa Clara Convention Center in Santa Clara, CA. Housed in the classic Denver Gas & Electric Building, 910 15th St., 910Telecom is a carrier-neutral telecom hotel located in the heart of Denver. Adjacent to CenturyLink, AT&T, and Denver Main, 910Telecom offers connectivity to all major carriers, Internet service providers, Internet backbones and ...
Jul. 25, 2016 08:50 AM EDT Reads: 209
Enterprise networks are complex. Moreover, they were designed and deployed to meet a specific set of business requirements at a specific point in time. But, the adoption of cloud services, new business applications and intensifying security policies, among other factors, require IT organizations to continuously deploy configuration changes. Therefore, enterprises are looking for better ways to automate the management of their networks while still leveraging existing capabilities, optimizing perf...
Jul. 25, 2016 08:30 AM EDT Reads: 1,043
SYS-CON Events announced today that Venafi, the Immune System for the Internet™ and the leading provider of Next Generation Trust Protection, will exhibit at @DevOpsSummit at 19th International Cloud Expo, which will take place on November 1–3, 2016, at the Santa Clara Convention Center in Santa Clara, CA. Venafi is the Immune System for the Internet™ that protects the foundation of all cybersecurity – cryptographic keys and digital certificates – so they can’t be misused by bad guys in attacks...
Jul. 25, 2016 08:30 AM EDT Reads: 1,262
Redis is not only the fastest database, but it is the most popular among the new wave of databases running in containers. Redis speeds up just about every data interaction between your users or operational systems. In his session at 19th Cloud Expo, Dave Nielsen, Developer Advocate, Redis Labs, will share the functions and data structures used to solve everyday use cases that are driving Redis' popularity.
Jul. 25, 2016 08:30 AM EDT Reads: 1,555
SYS-CON Events announced today the Kubernetes and Google Container Engine Workshop, being held November 3, 2016, in conjunction with @DevOpsSummit at 19th Cloud Expo at the Santa Clara Convention Center in Santa Clara, CA. This workshop led by Sebastian Scheele introduces participants to Kubernetes and Google Container Engine (GKE). Through a combination of instructor-led presentations, demonstrations, and hands-on labs, students learn the key concepts and practices for deploying and maintainin...
Jul. 25, 2016 08:00 AM EDT Reads: 693
Ovum, a leading technology analyst firm, has published an in-depth report, Ovum Decision Matrix: Selecting a DevOps Release Management Solution, 2016–17. The report focuses on the automation aspects of DevOps, Release Management and compares solutions from the leading vendors.
Jul. 25, 2016 08:00 AM EDT Reads: 1,644
"Avere Systems is a hybrid cloud solution provider. We have customers that want to use cloud storage and we have customers that want to take advantage of cloud compute," explained Rebecca Thompson, VP of Marketing at Avere Systems, in this SYS-CON.tv interview at 18th Cloud Expo, held June 7-9, 2016, at the Javits Center in New York City, NY.
Jul. 25, 2016 07:30 AM EDT Reads: 1,996
"We formed Formation several years ago to really address the need for bring complete modernization and software-defined storage to the more classic private cloud marketplace," stated Mark Lewis, Chairman and CEO of Formation Data Systems, in this SYS-CON.tv interview at 18th Cloud Expo, held June 7-9, 2016, at the Javits Center in New York City, NY.
Jul. 25, 2016 06:30 AM EDT Reads: 1,499
When it comes to cloud computing, the ability to turn massive amounts of compute cores on and off on demand sounds attractive to IT staff, who need to manage peaks and valleys in user activity. With cloud bursting, the majority of the data can stay on premises while tapping into compute from public cloud providers, reducing risk and minimizing need to move large files. In his session at 18th Cloud Expo, Scott Jeschonek, Director of Product Management at Avere Systems, discussed the IT and busin...
Jul. 25, 2016 06:00 AM EDT Reads: 1,757
Large scale deployments present unique planning challenges, system commissioning hurdles between IT and OT and demand careful system hand-off orchestration. In his session at @ThingsExpo, Jeff Smith, Senior Director and a founding member of Incenergy, will discuss some of the key tactics to ensure delivery success based on his experience of the last two years deploying Industrial IoT systems across four continents.
Jul. 25, 2016 06:00 AM EDT Reads: 1,467
There will be new vendors providing applications, middleware, and connected devices to support the thriving IoT ecosystem. This essentially means that electronic device manufacturers will also be in the software business. Many will be new to building embedded software or robust software. This creates an increased importance on software quality, particularly within the Industrial Internet of Things where business-critical applications are becoming dependent on products controlled by software. Qua...
Jul. 25, 2016 05:45 AM EDT Reads: 1,356